Product Info for Sig Sauer Zulu9 11x45 Binocular, HDX Next to a zeroed rifle, a clear and bright pair of binoculars is the best piece of gear you can have. The Sig Sauer Zulu9 11x45 Roof Prism HDX Binocular combines superior optical performance with in-the-field utility. High quality glass, fully multi-coated Spectracoat lenses, and phase-coated Abbe-Konig prisms provide maximum brightness, contrast and crisp resolution. The ZULU9 performs in the harshest conditions, giving unmatched performance in inclement weather or rugged terrain. ZULU9 barrels are nitrogen-filled and will not fog in cold, wet weather. Ultra-premium mid to long range binocular utilizes the unique and efficient Abbe-Koenig prism designed to produce the highest in light transmission and brightness.